State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, People's Republic of China.
Environ Sci Process Impacts. 2013 May;15(5):919-29. doi: 10.1039/c3em00043e.
Heavy metals and persistent organic pollutants polychlorinated biphenyls (PCBs) and polybrominated diphenyl ethers (PBDEs) were analyzed in 34 surface soil samples collected from farmland and 7 soil or dust samples collected from the workshops in South China, where e-waste was dismantled using primitive techniques. The results show that Cd, Cu and Hg were the most abundant metals, in particular Cd pollution was serious in farmland soils, and the median concentrations in farmland soils were beyond the environmental quality standard for soils (China Grade II). A correlation between Cd, Cu, Zn, Pb and PCBs or PBDEs was significant indicating similar sources. Among the PCB congeners, high relative similarity was observed between the e-waste dump site soil (EW1) and Aroclor 1254, implying that the technical product Aroclor 1254 was one of the major sources of PCB contamination. High concentrations of PCBs in workshop dusts (D2 and D3) (1958 and 1675 μg kg(-1)) demonstrated that the workshops dismantling electrical wires and cables, electrical motors, compressors and aluminum apparatus containing PCBs in lubricants represent strong PCB emission sources to this area. Principal component analysis (PCA) and PBDE homologue patterns verify that farmland soils surrounding the e-waste recycling sites were enriched with lower brominated congeners, and the major source of PBDEs in dust samples might potentially be associated with the extensive use of deca-mix technical products as a flame retardant. The difference between e-waste soils, dusts and farmland soils can be observed in the PCA score plot of PCBs and PBDEs, and E-waste soils and dusts exhibited more diversity than farmland soils. Furthermore, a prediction of the particular kinds of pollution from different recycling activities through the analysis of each contamination and the connections between them was investigated.
重金属和持久性有机污染物多氯联苯（PCBs）和多溴二苯醚（PBDEs）在华南 34 个农田表层土壤和 7 个拆解电子废物的车间土壤或粉尘样本中进行了分析。结果表明，Cd、Cu 和 Hg 是最丰富的金属，特别是农田土壤中的 Cd 污染严重，农田土壤的中位数浓度超过了土壤环境质量标准（中国二级）。Cd、Cu、Zn、Pb 与 PCBs 或 PBDEs 之间存在显著相关性，表明它们具有相似的来源。在 PCB 同系物中，电子废物倾倒场土壤（EW1）和 Aroclor 1254 之间存在高度相似性，这表明技术产品 Aroclor 1254 是 PCB 污染的主要来源之一。车间粉尘（D2 和 D3）中的 PCBs 浓度较高（1958 和 1675μgkg(-1)），表明拆解电线电缆、电机、压缩机和含有 PCB 润滑剂的铝设备的车间是该地区 PCB 的重要排放源。主成分分析（PCA）和 PBDE 同系物模式证实，电子废物回收场地周围的农田土壤富含低溴同系物，粉尘样品中 PBDEs 的主要来源可能与十溴联苯醚技术产品作为阻燃剂的广泛使用有关。通过对每个污染物及其相互关系的分析，可以在 PCBs 和 PBDEs 的 PCA 得分图中观察到电子废物土壤、粉尘和农田土壤之间的差异，并且电子废物土壤和粉尘表现出比农田土壤更多的多样性。此外，通过分析每种污染物及其相互关系，探讨了不同回收活动产生的特定污染类型的预测。
